Niche for Thoughts

Will Cyber Courts be the solution?

2009-08-01T22:39:00.000-07:00

As almost all the aspects or out lives in the contemporary society, major fraud has also become high tech. But it’s important to remember that it’s not the technology that commit crimes, but it’s the people that use them.

It is really hard to define such a broad term as cyber fraud. There is, however, a few general characteristics you find in all cyber fraud. Most of these are done by e-mail (Spam). They entice users to give them critical information like usernames, passwords, credit card information, or other types of account information. Although many attacks come from outside the organisations, some are ‘insider jobs’ - carried out by employees who have access to systems within the company’s defenses. Consumer Fraud Reporting (CFR) has come up with the 'Top 10 List of Current Scams - 2008'. You can have a look at these Scams at http://www.consumerfraudreporting.org/current_top_10_scam_list.htm.

The Internet Crime Complaint Center (IC3), in 2009 released its latest annual report on victims' complaints received and referred to law enforcement. From January 1, 2008 – December 31, 2008, the IC3 website received 275,284 complaint submissions. This is a (33.1%) increase when compared to 2007 when 206,884 complaints were received. This clearly shows that, this is becoming a huge problem to cater in the future for the law authorities. The following figure clearly shows the acceleration of cyber fraud over the years.

So, where lies a solution for this?

After a lame attempt to solve the cyber crime cases in regular courts for more than 8 years and after previous attempts been incredulous, Indian Government has recognized the need of a separate court for cyber crimes and is looking to set up at least one cyber court in each region to handle cases related to cyber crimes like email forger, email and website hacking, identity theft, data theft etc. The first cyber court has been setup in Delhi with Justice Rajesh Tandon as the presiding officer of Cyber Regulation Appellate Tribunal.

Will this solve the issues of Cyber Crimes? The whole world would be eying on this solution with profound eager.

Custom search engines by Google

2009-02-05T03:41:00.000-08:00

Google has come up with a new idea, which most of the web site owners were looking forward. Google's new Custom Search Engine (Google CSE) program enables web site owners to define their own search engines. CSE provides a deceptively simple form-based interface for building a domain-specific search engine on top of the Google search platform. When the user performs a search in the provided custom search, the users are redirected to a web page which looks similar to the traditional google search results page. The web owner can even customize that page to look like a web page of his existing site.

Besides, Google plans to share the ad revenue from the resulting search results pages, through the site owner's existing AdSense accounts. Many site owners will find this a very attractive part of the program too.

Try Google custom search. You can download the necessory code from here. Just copy and paste the code to your site and you are ready to go.

Cheers!!

Overhead of a Google Search..

2009-01-31T10:46:00.000-08:00

In my very last lecture of undergraduate life, my lecturer brought out a really interesting point about the overhead of a google search, which we perform really often.

I found out that Harvard University physicist Alex Wissner-Gross had done the math on that and estimated each Google search is responsible for 7 grams of Carbon Emissions. To put that in less virtual terms, he suggests every two searches generate as much carbon dioxide as it does to boil a kettle of water for tea. In terms of greenhouse gases, one Google search is equivalent to about 0.2 grams of CO2. The current EU standard for tailpipe emissions calls for 140 grams of CO2 per kilometer driven, but most cars don't reach that level yet. Thus, the average car driven for one kilometer produces as many greenhouse gases as a thousand Google searches.

Google explains that issue in its official blog as follows. "Queries vary in degree of difficulty, but for the average query, the servers it touches each work on it for just a few thousandths of a second. Together with other work performed before your search even starts (such as building the search index) this amounts to 0.0003 kWh of energy per search, or 1 kJ. For comparison, the average adult needs about 8000 kJ a day of energy from food, so a Google search uses just about the same amount of energy that your body burns in ten seconds."

So its time to think twice before a google search. Having said so, I truly believe that no software Engineer in this world can survive without a google search.

How to repair the GRUB..

2009-01-29T11:50:00.001-08:00

I have been using both Windows XP and Ubuntu 8.04 as the operating systems in my laptop. But after formatting the Windows XP OS of my laptop, I had no way of accessing the ubuntu partition. I was wondering whether I will have to reinstall ubuntu in my laptop. Then I found the solution. The following steps will lead you to repair the GRUB and reaccess the unseen ubuntu partition, if you have the same problem.

1. Boot the PC or Laptop with an Ubuntu Live CD.

2. Open a Terminal

3. Type the following command..

sudo grub

4. Type the following followed by the TAB key

root (hd

5. This will show the list of physical drives.

6. Type the number of the drive you installed ubuntu on,.

7. If you are not sure about the ubuntu installed drive add a ‘,‘ after the number and press theTAB key again.

root (hd0,

8. This will enable you to see something like following,

grub> root (hd0,
Possible partitions are:
Partition num: 0, Filesystem type unknown, partition type 0×7
Partition num: 1, Filesystem type is ext2fs, partition type 0×83
Partition num: 2, Filesystem type unknown, partition type 0×7
Partition num: 3, Filesystem type is fat, partition type 0xb
Partition num: 4, Filesystem type is fat, partition type 0xb

9. The ext2fs partition is the one Ubuntu is installed partition of your machine.

10. The type the following with replacing 1 with the ubuntu installed partition num of your mechine.

root (hd0,1)

11. Finally type the following, replacing hd0 with the physical drive Ubuntu is installed

setup (hd0)

This worked out fine for me. Hope it will work with you too. Let me know if there are any issues.

Cheers!!

Basics on Neural Networks

2009-01-26T13:48:00.000-08:00

Currently I'm working on a project, which integrates Artificial Intelligence to a software application of a local software company in Sri Lanka. So I thought of writing down some of the basics on neural networks, which could be helpful for a beginner in the field. Some of the information follows, are the theories of neural networks and some of the information are my own experience in the field.

The best definition for the term 'Neural Network' I found was provided by the inventor of one of the first neurocomputers, Dr. Robert Hecht-Nielsen. He defines a neural network as: "...a computing system made up of a number of simple, highly interconnected processing elements, which process information by their dynamic state response to external inputs".

The motivation for the development of neural network technology stemmed from the desire to develop an artificial system that could perform "intelligent" tasks similar to those performed by the human brain. Neural networks resemble the human brain in the following two ways:

1. A neural network acquires knowledge through learning.

2. A neural network's knowledge is stored within inter-neuron connection strengths known as synaptic weights.

The true power and advantage of neural networks lies in their ability to represent both linear and non-linear relationships and in their ability to learn these relationships directly from the data being modeled. Traditional linear models are simply inadequate when it comes to modeling data that contains non-linear characteristics. Depending on the nature of the application and the strength of the internal data patterns you can generally expect a network to train quite well. This applies to problems where the relationships may be quite dynamic or non-linear. Artificial Neural Networks(ANN) provide an analytical alternative to conventional techniques which are often limited by strict assumptions of normality, linearity, variable independence etc. Because an ANN can capture many kinds of relationships it allows the user to quickly and relatively easily model phenomena which otherwise may have been very difficult or imposible to explain otherwise.

Neural neworks are typically organized in layers. Layers are made up of a number of interconnected 'nodes' which contain an 'activation function'. Patterns are presented to the network via the 'input layer', which communicates to one or more 'hidden layers' where the actual processing is done via a system of weighted 'connections'. The hidden layers then link to an 'output layer' where the answer is output to that.

A trained neural network can be thought of as an "expert" in the category of information it has been given to analyze. This expert can then be used to provide projections given new situations of interest and answer "what if" questions. Other advantages include:

1. Adaptive learning: An ability to learn how to do tasks based on the data given for training or initial experience.

2. Self-Organization: An Artificial Neural Network can create its own organization or representation of the information it receives during learning time.

3. Real Time Operation: Artificial Neural Network computations may be carried out in parallel, and special hardware devices are being designed and manufactured which take advantage of this capability.

4. Fault Tolerance via Redundant Information Coding: Partial destruction of a network leads to the corresponding degradation of performance. However, some network capabilities may be retained even with major network damage.

There are a few drawbacks in using neural networks for modeling applications too.

1. Minimizing overfitting requires a great deal of computational effort.

2. The individual relations between the input variables and the output variables are not developed by engineering judgment so that the model tends to be a black box or input/output table without analytical basis.

3. The sample size has to be large.

I hope this will give a basic introduction to the field of neural networks. I hope to give an implementation tutorial on neural networks by upcoming posts.

cheers!!

How to add HTML content to java mails

2008-04-04T03:18:00.000-07:00

It is easy to develop e-mail applications using the Java Mail API. This article will demonstrate how to send a e-mail using your java application and how to add attachments and HTML contents to that mail sent by you.

The following code segment illustrates how to send a basic e-mail in java.

import java.util.*;
import javax.mail.*;
import javax.mail.internet.*;
import javax.activation.*;

// Send a simple, single part, text/plain e-mail
public class TestEmail {

public static void main(String[] args) {

// mention the relevant email addresses!!!
String to = "theguy@theguy.com";
String from = "chulakar@gmail.com";

// mention the ISP's email server!!!
String smtphost = "mail.usermail.net";
int smtpPort = 25;

// Create properties, get Session
Properties props = new Properties();

// If using static Transport.send(),
// need to specify which host to send it to

props.put("mail.smtp.host", smtphost);
props.put("mail.smtp.port", "" + smtpPort);
Session session = Session.getInstance(props);

try {
// Instantiatee a message
Message msg = new MimeMessage(session);

//Set message attributes
msg.setFrom(new InternetAddress(from));
InternetAddress[] address = {new InternetAddress(to)};
msg.setRecipients(Message.RecipientType.TO, address);
msg.setSubject("Test E-Mail through Java");
msg.setSentDate(new Date());

// Set message content

// msg = attachHTML(msg);
msg.setText("This is a test of sending a plain text e-mail through Java.);

//Send the message
Transport.send(msg);
}
catch (MessagingException e) {

e.printStackTrace();
}
}
}

Then we can add attachments and HTML contents to the context of the e-mail. You can try this by uncommenting the "attachHTML" method and commenting out the "msg.text" part of the above code segment. The "attachHTML" method is given below.

public Message attachHTML (Message msg){

Multipart mp = new MimeMultipart("related");

// the attacharray is the array which contains the file names of the
// attachments to be added

if (attacharray != null && attacharray.size()>0){
for(int i=0; i MimeBodyPart p1 = new MimeBodyPart();
DataSource source = new FileDataSource(attacharray.get(i).toString());
p1.setDataHandler(new DataHandler(source));
p1.setFileName("AT"+i);
mp.addBodyPart(p1);

}
}
// now create second part
MimeBodyPart p2 = new MimeBodyPart();

// now add the HTML content for the e-mail which is constructed as a String
//and called as the "htmlContent"

p2.setContent(htmlContent, "text/html");

mp.addBodyPart(p2);

// Set Multipart as the message's content
msg.setContent(mp);
return msg;
}

I think the above code will work for you as it did to me. All the best!!

Happy coding!