Fuzzy Time Series

Fuzzy Time Series is one of method that usually used for predicting. Fuzzy Time Series is combining of data time series and using fuzzy logic to create prediction for what's next. In Fuzzy Time Series the data that used is data time series, which is have many time sequences of data, and the variable can be only one. For example : Sales Total of Dept. Store X in 2000 - 2010. It's contain only 1 variable data which is Total Sales, but it has many sequence data, for example : per month, year.

To use this method, simply find the data that have sequence time,or we called data time series, then preprocessing the data, then using this Fuzzy Time Series to predict. We can preprocess data with many ways, for example : using Min-Max Normalization and Z-Score Normalization. This preprocessing is done for making the data better. In Fuzzy Time Series, it will be good, if the differences (lag) between data is not too high, because it will take effect on the prediction.

Well after the data being processed, simply use this method. There are many steps of Fuzzy Time Series. First step, Making the Interval.
The interval is determined by look at the data. We should find the data maximal, minimal, lag between data, and average of lag.After we find these attributes, we can calculate data by Range/(Avg.lag/2). Range is Dmax - Dmin.

Mobile malware is increasing

Cyber ​​threats are increasingly mushrooming. In addition to viruses or malware, phishing threats also continue to lurk in the internet users around the world, including Indonesia.
It says Business Development Manager Kaspersky Lab Southeast Asia Dony Koesmandarin, with the increasing number of smartphone users grows, the threat to users has now spread to mobile devices, such as cell phones and tablet PCs.

Scientists create invisibility viewing tools!

Google Glass function less 'horrible'? This technology may make some people more frightened. Because, with this device people can see invisibility.
Scientists from the Massachusetts Institute of Technology (MIT) experimented with a system they called Wi-Vi. The system is able to track objects moving behind the wall, using the wireless system is fairly inexpensive and readily available everywhere.

Wi-Vi can be embedded in a smartphone or handheld device specific. Dina Katabi, professor who developed the Wi-Vi with students Fadel Adib said, this system will be used for legal purposes or rescue during a natural disaster.
However, according to Katabi, users can use the gadget. For example, when a person is concerned there are following or stalking from behind, he could use gadgetnya to detect whether or not there are people behind the wall.

PHP Basic - Casting, Variable, Constants, Error Controlling Operator

After reading these post : PHP basic 1 and 2, i'd like to continue to add more basic on PHP. This time i will adding some basic on casting, variable, constants, and operator.

Casting
PHP can cast data automatically, for example :

<?php
$a = 15;
$b = '2';
$times = $a*$b;
echo $times;
?>

As you see $a is integer and $b is string, but PHP change the string into integer automatically, because the string also number. It can happen only if the inside string is integer type.

Moreover, we can manually casting the variable, for example:

<?php
$a = 15;
$b = 4;
$times = $a/$b;
$casttimes = (int) $times;
echo "before cast : $times<br>";
echo "after cast to integer :$casttimes";
?>

Try to run it, $times will display 3.75 which is float type, and after cast to integer, it will display 3 only. We can cast into data types that available in PHP, which is :

- (int) (integer) : cast into integer

- (float) (double) : cast into float

- (string) : cast into string

- (object) : cast into object

- (array) : cast into array

Variable

- Predefined Variable

We have learned about variable at last post, well there are some predefined variable, that provided by PHP :  

* $_SERVER
To access variable that available in server
* $_POST
To take data from form or HTTP POST
* $_GET
To take data from url
* $_COOKIE
To take data from cookies that stored in web
* $_FILES

To take data from HTTP POST files.

We will use mostly $_POST when we creating web. It's useful when used with form.

- Variable Variable

What's this? sounds weird huh? Yap, this is one rule that apply too in PHP. To understand more, let's take a look at this example :

<?php
$a = 'Alex';
$$a = 'Oxlade';
$$$a = 'Chamberlain';
echo $a."<br>";
echo $$a."<br>";
echo $$$a."<br>";
?>

As you see in code above,  $$a is same as $alex, which is, $alex is still null, and we fill it with 'Oxlade', and when we want to display it, just type $$a, and it will display Oxlade. Same implements that work in $$$a.

PHP Writing Rule - Part 2

Please visit : Part 1 to learn from beginning.

Now let's continue for other writing rule of PHP. But don't forget to run these code into your browser ok? So you can see what's the result like.

5. Case Sensitive

<?php$a = 10;$A = 15;
echo "a = $A";?>

The above code tell us that the $a and $A is different, so take care when you will code, the variable name must be precise.

PHP Writing Rule - Part 1

Welcome back!

Well i want to share some of PHP Writing Rule. It should be in the beginning of learning PHP, but i forget to tell you about this part.

Before that you need to learn how to display some code in browser, you can learn it from page : Excercise PHP-1

Okay,let's just start. PHP have some rule in their code. Here are some of the rule :

How to Create Invitation Label Name for Invitation Card

Hello again bloggers!

Well right now, i want to post something outside the IT stuff, but also educated! Yeah, it's about creating invitation label name for invitation cards.

Have you ever invited to the party with many people in there? Such as wedding party, graduation party, or home-coming party? In those big events, the host of the party usually create invitation cards to people who will be invited. Well if the invited people is around 50 people, yeah we can still type the name in the invitation cards manually, but if hundred? moreover thousand? We need something that make our work easier.

So i search the google and found this, how to create invitation label name for invitation card, in this event is wedding party, with more flexible.