Symbian Operating System

As a part of our Mobile Computing curriculum, we had case studies on several mobile Operating Systems like the Symbian Operating System, Windows CE and the Palm Operating System.

Our faculty encouraged us to explore these topics and present them to our other class-mates so that we get a lot more exposure to the subject.

Thrilled by the fact that the Symbian Operating System is an open-source mobile Operating System, I decided to take up the topic. I put a little effort into understanding the Symbian Operating System. It was exciting to find out my phone (Nokia N73) had the Symbian Operating system and I took an opportunity to tweak around with it.

I also planned a few live demos emphasizing application development on the Symbian Operating System with the help of programming languages like Java and Symbian C++.

With the support from the faculty of my college, a session covering the Symbian Operating System, along with J2ME development on it was presented on 27th October.

The presentation covered the following topics -

• Introduction to Symbian Operating System
• A Brief History of Symbian Operating System
• Symbian Foundation
• Features of Symbian Operating System
• Operating System Architecture
• Memory Management
• Threading and Security
• Application Development In Symbian OS

The presentation was followed by two live demos covering -

• Symbian C++
• Java 2 Micro Edition

The session concluded with a quick comparison of Symbian C++ and Java ME and how an application can leverage the benefits of the languages when developing an application.

As the target audience for the presentation was primarily the final year students, we had around 40 students participating in the presentation.

At the end we provided a link to the NetBeans website to encourage them to download the latest version of NetBeans along with the mobility pack so that they can go deeper into developing J2ME mobile applications.

Check out the photos at http://picasaweb.google.com/osum.source/SymbianOperatingSystem#

A Linux Workshop

Recently the faculty of my college along with the support of the students organized a Linux workshop. The workshop focused on the basics of the Linux operating system. The workshop was held for two consecutive days in which the students learnt a lot about the fundamentals of Linux.

The workshop was organized on 23^rd and 24^th October.

The workshop was conducted by Mr. Ahmad Jabas, a PhD scholar of our college. He emphasized various concepts of Linux with the help of the Debian Operating System.

Virtualization was also covered as a part of the workshop with the help of VirtualBox. There was a live demonstration where the Debian Operating System was installed on VirtualBox.

Here is a quick overview of the various activities that were covered in the two days -

Day 1

Topics covered -

• Introduction to Linux
• Origin of the Linux Operating System
• History of the Linux Operating System
• The GNU Project and Source Code Freedom
• Linux Philosophy
• Linux Installation
• A comparison of the Linux Operating System and the Windows Operating System
• UNIX/Linux commands

Day 2

Topics covered -

• Virtualization
• Virtual Machines
• System Virtual Machines
• Process Virtual Machines
• Full Virtualization
• Applications of VMs
• VirtualBox
• Linux Installation on VirtualBox
• Shell Scripting

Various demonstrations were given which included several concepts like -

• Stand-alone installation of Debian
• VirtualBox installation of Debian
• Linux commands
• Shell Scripting

The workshop was very inspirational and several attendees installed the Linux Operating System on their computers and started working with it.

There were about 65 students who attended the workshop both the days.

Oracle Forms

I recently gave a presentation on "Oracle Forms" - a feature of the Oracle developer suite which helps GUI designers to quickly design screens to facilitate easy insertion, deletion, update and query of tables in a database.

The third years were asked to learn about Oracle forms for their final examination. I decided to take this opportunity to talk about it.

Oracle Forms runs on Java containers and the GUI is presented in the form of Java applets to the user. The Java container is known as "Oracle Container for Java (OC4J)" in the Oracle Forms architecture.

The presentation was given on 21st October which was followed by a live demo which emphasized how an Oracle form is created and how is it run with the help of Java containers.

The presentation covered the following topics -

• Introduction to Oracle Forms
• Oracle Forms Architecture
• Single Block Forms
• Master Detail Forms
• List Of Values
• Non-base table fields
• Triggers
• Troubleshooting

The presentation was followed by live demos covering -

• Single Block Forms
• Master Detail Forms
• List Of Values

The session concluded with emphasize on technologies like JSPs, Servlets, JDBC, etc. which are swiftly replacing Oracle Forms because of their customizability.

As the target audience for the presentation was primarily the third year students, we had around 40 students participating in the presentation.

Check out the photos at http://picasaweb.google.com/osum.source/OracleForms#

SFD 2009 - Competitions & Presentations

This year, as a part of the Software Freedom celebrations, we hosted a few competitions and gave a few informative presentations. Here is a quick overview of them -

Essay Writing Competition

The competition was primarily to encourage participants to explore various Open Source topics - technical and non-technical, and come up with innovative articles. We had a huge response for this and had a tough time selecting the best entries. We had various topics covering different perspectives of the Open Source world. Below are a few of the articles which were really good.

Open Source - The article covered the basic philosophy of Open Source and gave an insight about the economic perspective of OSS. It also emphasized the innovation which drives Open Source products.

VirtualBox - The article covered the salient features of the VirtualBox OSE. It gave a bird's-eye view of VirtualBox, with a focus on the technical strongholds of the virtualization package. It also briefly described the advancements planned in the development of VirtualBox.

Open Source in the Cloud - This article merged the philosophy of Open Source with the innovative paradigm of Cloud Computing. It gave an overview of what Cloud Computing is and highlighted the contribution of Sun Microsystems Inc. to the cloud.

Google Chrome - The article was primarily about the Open Source web browser from Google, Chrome. It focused on the prominent features of the browser and gave a description of features like speed, stability, security, etc.

Top Ten Linux Distributions - The article was mainly a mash-up of the Operating Systems built on the Linux kernel. The author reviewed various Linux in the article. Several flavors like Debian, Slackware, Fedora, Mandriva, OpenSUSE, Ubuntu, Gentoo, LinuxMint, PCLinuxOS and the CentOS were covered in this.

Open Source Quiz

This was one of the most exciting events of Software Freedom Day this year. We wanted more participation of the audience this year, so as to achieve this and bring up the spirit of Open Source in the audience; we planned an Open Source Quiz.

To accommodate the entire audience, the quiz was conducted in two stages - there was a preliminary round which had a questionnaire of around 20 questions. Almost everybody in the audience was interested in the quiz and came forward for the prelims. After the prelims, the top 6 teams were invited for the final round. The round had an oral questionnaire and consisted of around 6 sub-rounds.

Finally at the end of the final sub-round the highest and second-highest scorers were declared the winners. There was a neck-to-neck competition between the teams till the end and had the pulse of the crowd running.

Overall, the quiz was the show-stopper of the day. Hats off to the quiz-masters! - Miss. Devika and Mr. Roopak Bhartee.

Software Freedom Day and Open Source

In order to convey the philosophy of Open Source and the importance of Software Freedom Day to the audience, Mr. Vishwak gave a presentation titled "Software Freedom Day and Open Source".

The presentation emphasized on various concepts like -

• What is Open Source?
• Free Software
• Why the move to Open Source?
• Perception and participation
• Software Freedom Day
• Contribution of Sun Microsystems Inc. to the Open Source world
• Sun’s Open Source strategy
• Overview of the Open Source technologies of Sun
• The session was very informative and the audience had a through insight about the OSS world

Sun Academic Initiative

To help the audience realize the importance of certifications and inform them of the wonderful discounts available on various Sun certifications, Mr. Laxman took up a presentation on "Sun Academic Initiative".

The presentation focused on various topics like -

• Introduction to SAI
• Benefits of certifications
• The Java certification hierarchy
• The Solaris certification hierarchy
• The MySQL certification hierarchy
• Various certifications available as a part of SAI
• Registration process at SAI
• A step-by-step explanation of how to purchase a voucher and avail the huge discounts

The session was inspiring and there were several students who were keen on taking up a certification exam. The various tutorials and the learning programs of SAI were highlighted which created a confidence in the interested students to pursue the certification.

On a whole, Software Freedom Day 2009 was a huge success wherein the participants and the organizers enjoyed and learnt a lot.

Photos uploaded at http://picasaweb.google.com/osum.source.

Software Freedom Day 2009

It is finally September and Software Freedom Day is here. This is one day when every Open Source enthusiast feels proud of being one. If you haven’t heard about Software Freedom Day, here is what SFD is all about -

"Software Freedom Day (SFD) is an annual worldwide celebration of Free and Open Source Software. It is a public education effort to celebrate the virtues of FOSS and to encourage its use. It is celebrated on the third Saturday of every September."

Open Source has spread its wings all over the world and Sun Microsystems Inc. being one of the biggest supporters of the Open Source community encouraged many OSUM leaders and Sun Campus Ambassadors to celebrate Software Freedom Day in a grand way.

Osmania University, being a huge supporter of FOSS, wasn’t behind in the grandeur of SFD. We decided on celebrate Software Freedom Day on the third Saturday itself, which was on September 19th.

Due to the recent unforeseen holidays which were declared in our city, there were speculations that 19th might be a working day as a compensation for them. Because of this, our preparations came to a stand-still and we had to wait for a formal announcement. We didn’t get any reliable information till Friday and because of this we had only a day for the publicity in our college. As a lateral consequence of this speculation, we didn’t even get an opportunity to invite other colleges to the event. :(

Well as people say "Things must go on!" and things did go on. Despite these bottlenecks, we had a reasonable crowd of 55 to 60 open source enthusiasts for the event. It was really soothing to see such participation amidst the tailback. The crowd comprised of students from the 2nd, 3rd and 4th years. We weren’t given permission to invite the 1st year students due to security concerns from the college.

I was sure that the students of my college were bored of hearing my presentations by this time, so for a change, I requested a few of my friends to take up the co-ordination of the competitions and presentations. They immediately agreed and showed a lot of interest.

The celebrations of SFD began with a motivating speech by our HOD, Prof. Lakshmi Rajamani. She spoke on Open Source Software and emphasized the support being provided by our college to the OSS world. She gave a brief introduction on SFD and how Osmania University was a part of it over the years.

There were many activities that were held at our campus as a part of SFD. Several competitions were held to motivate the students towards SFD. We had an "Essay writing competition" where the participants were asked to explore various Open Source topics - technical and non-technical and come up with an innovative article. There was an "Open Source Quiz" organized by Mr. Roopak Bhartee and Miss. Devika. A presentation emphasizing the merits and benefits of FOSS was given by Mr. Vishwak. There was a presentation on the "Sun Academic Initiative" by Mr. Laxman. To know more about these events, check out the "SFD 2009 - Competitions & Presentations" blog-post.

The event was concluded by a "Vote of thanks" by me. The entire event was well anchored by Miss. Pravallika.

On a whole, the event was a huge success and there was a lot of enthusiastic response from the participants. The entire S.O.U.R.C.E group was delighted and enthused by the participation of the crowd for the event.

Photos uploaded at http://picasaweb.google.com/osum.source.

Three Years Of Vivacious Blogging

It’s been three years I started this blog and wrote my first article.

With a great apprehension on my mind whether I can write public articles or not, I took a bold step and began my online endeavor on 21st September 2006. To describe my blogging experience till today in one line, I would call it a "Roller Coaster Ride" - filled with twists and twirls, but on a whole, exciting and exuberant.

Like any blogger, my biggest question was "What to write in my blog?" Initially I was clueless and wrote all kinds of articles ranging from my personal experiences to casual stories. But as time progressed I realized my strength and decided to make this a technical web-log. (Yes, I know I am violating my principle with this blog-post :P).

From then my life became simpler and the number of my blog-posts increased. As time progressed, several technical topics like "Play-Station Emulators", "The Towers of Hanoi" and "w32.USBWorm" were emphasized in my blog. My blog became a focus point of various presentations I gave in these years. Presentations like "Service Oriented Architecture", "Globalised Solutions" and "Programming with Qt" were highlighted.

As time moved on, I became the Sun Campus Ambassador of my college. Then I started a new blog at http://blogs.sun.com/gautam/. I stuck to my resolution of making this a technical blog and continued my technical articles here and wrote my personal experiences in the other blog. Topics like "NetBeans" and "OpenSolaris" became a part of my blog after this.

On a whole, there are 85 blog-posts on this blog and 22 blog-posts on my Sun blog till date.

I am sure a lot of you are thinking "Who visits this blog?" I also used to contemplate over this question a lot. Then on 8th September 2009 I took a daring decision, decided to track my blog and signed up at Google Analytics. I was shocked by the results. From September 8th to September 23rd (16 days), my blog had 470 visits with 761 page-views. The visitors had a massive geographical diversity, spread across 42 countries, 112 cities and covering all the continents. As Google Analytics results cannot be displayed, I put a ClustrMap here for the visitors to see, so do check it out if you would like to view the regional diversity of the visitors of the blog.

If you are a blogger like me, do sign-up for Google Analytics, you will be surprised by the results. For more details have a look at my previous post.

During these three years I was fortunate to see the blogs of several of my friends come up and it was very exciting to read their magnificent articles. So I decided to create a network of these blogs here, do check them out after you finish reading this article.

It would be inappropriate to end this blog-post without thanking everybody who encouraged me to start this blog and contributed to this blog with their constant feedback and guidance.

Thanking them from the bottom of my heart and hoping more and more blog-posts come up here, Adios, Au Revoir, Sayonara and Good bye till my next blog-post.

Web Analytics - Boosting Performance

Every web-site/blog has visitors. Understanding the regional spread of these visitors and analyzing which articles (pages, products, etc.) bring in more visitors (customers), is vital for improving the business of the web-store or attracting more visitors to the blog/web-site.

In this blog-post we are going to emphasis two popular web-site tracking tools - ClustrMaps and Google Analytics. In the next few sections I will refer blogs and web-stores as also web-sites. The principle is same for all of these.

Google Analytics

Google Analytics is a brilliant innovation from labs of Google. It helps you analyze the traffic feed of your web-site in various perspectives. As Google describes it -

"Google Analytics is the enterprise-class web analytics solution that gives you rich insights into your web-site traffic and marketing effectiveness"

It has some really cool features that a web-site manager would love. There are four major components on Google Analytics -

Visitors Overview - This component keeps track of every visitor that visits your web-site. It provides complete information on the number of visits, number of absolute unique visits, page-views, total time spent by visitors on the site and a percentage of new visits. One important parameter it keeps track of is the bounce rate. Bounce Rate is a measure to see how appealing the web-page was for the visitors. High percentages of bounce rate indicate the visitors moved out of the web-site quickly. It maintains complete information of the browsers used by the visitors and their connection speed.

The geographical aspect of the visitor overview is marvelous. It shows a comprehensive analysis of the visitor’s geographical location. It pin-points the city from where a visitor has come.

Traffic Sources Overview - This component gives an overview of the sources of the traffic. It also provides a report on the sites which led the visitors to your web-site. For people targeting search engines, it provides a comprehensive analysis of the keywords which led the people to the web-site.

Content Overview - This component provides a detailed analysis of individual pages viewed by the visitors. It provides us with the total number of page-views, unique page-views and the bounce rate. It also provides us with the list of the pages which brought in the most visitors. It also shows us how many times each component of the web-site was clicked and the navigation patterns of the visitors.

Goals Overview - This component helps us to understand our objectives and keep a track of how far we have reached them. Goals can be setup with respect to every traceable unit of the blog like the page views, keyword patterns, etc.

Signing Up for Google Analytics

So if you are excited by these features and would like to add Google Analytics support to your web-site, follow these steps -

1. Go to http://www.google.com/analytics/sign_up.html
2. Sign in with your Google account
3. Sign up for Google Analytics by providing the URL of your web-site and few other details
4. After filling in the form, you will be provided with a JavaScript code snippet. Copy this code to your web-site. For blogger, paste the code before the closing head tag in the Edit HTML component of the layout tab
5. After a few hours, if the process was carried out properly the Google Analytics service will be running on your web-site. You can view the status by signing in at the Google Analytics web-site

ClustrMaps

Google Analytics is good for analyzing your web-site behind the screen. But it does not allow visitors to see the geographical diversity of the other visitors. So if you are interested in showing the visitor count along with their geographical location to the public, go for ClustrMaps.

To register your web-site with ClustrMaps, follow these steps -

1. Go to http://www.clustrmaps.com/
2. Provide the URL of your web-site and give your email id
3. Select the style which suits your web-site
4. Copy the code which is provided to your web-site

Well that’s it for this post. Hope this post helps in increasing the visitors to your web-site. :)

Symbian Operating System

The Symbian Operating System is an embedded Operating System developed by Symbian Ltd. It was built primarily for the ARM processor architecture. Though Symbian isn’t completely open sourced, parts of its code-base have been made public.

I recently gave a presentation on this and the topics covered were -

• The Symbian Foundation and a brief history about it
• The notable features of the Symbian Operating System
• The Operating System structure
• Memory management
• Process and thread management
• Issues related to security and malware
• The success stories of the Symbian OS
• Application development in Symbian using Symbian C++ and Java ME

Download the presentation here.

The presentation was followed by two demos - one covering Symbian C++ and the other covering Java ME. The software used in the demos -

• Active Perl 5.6
• Symbian SDKs
• Java Development Kit 6.0
• Carbide.c++ 2.0
• NetBeans 6.7.1
• Sun Java Wireless Toolkit

Download the installation guides for these software here. (They contain screen-shots which are self-explanatory). Download screen-shots for the Hello World demos here.

Visit the Symbian foundation web-site at http://www.symbian.org/.

If any discrepancies are found in the presentation or in any one of the guides, please post the problem in the comments section.

Cloud Computing Demystified

After a two months summer vacation, my college reopened the previous month. With the already hectic schedule involving placements and strenuous classes, we (the fourth year students) were also asked to start our preparation for the final semester projects. :(

We were asked to pursue our projects in various domains like Grid Computing, Distributed Systems, Image Processing, etc. with the help of the faculty. Cloud Computing was one of these domains.

Realizing that cloud computing is an activity topic in the campus ambassador program and understanding that most of my classmates were new to this domain, I decided to present a small presentation giving an introduction on cloud computing to my classmates.

With the support from the faculty of my college, a concise presentation covering the basics of cloud computing was presented on 10th August.

The presentation covered the following topics -

• The Basics of Cloud Computing
• A Brief History of Cloud Computing
• Various delivery mechanisms of Cloud Computing like Infrastructure as a Service, Platform as a Service, Software as a Service, Data as a Service

As the target audience for the presentation was primarily the final year students, we had around 50 students participating in the seminar.

At the end we provided a link to the Sun’s white paper on Cloud Computing - "Introduction to Cloud Computing Architecture" for the audience to get a better grasp on the domain - www.sun.com/featured-articles/CloudComputing.pdf

Check out the photos at http://picasaweb.google.com/osum.source/CloudComputingDemystified#

Sun Certified Java Programmer

I recently attempted the "Sun Certified Programmer for the Java Platform, Standard Edition 5.0" exam and passed with a score of 97%.

The SCJP exam is primarily for programmers interested in demonstrating proficiency in the fundamentals of the Java programming language.

The certification tests the programmer if he/she understands the basic syntax and structure of the Java programming language and if he/she can create Java technology applications that run on server and desktop systems using J2SE.

The certification, as of today is available in two flavors - 5.0 and 6.0.

Moreover, SCJP is the primary pre-requisite for more complex exams like Sun Certified Java Developer (SCJD), Sun Certified Web Component Developer (SCWCD), Sun Certified Business Component Developer (SCBCD), Sun Certified Developer for Java Web Services (SCDJWS) and Sun Certified Mobile Application Developer (SCMAD).

Check out the entire java certification path at http://www.sun.com/training/certification/java/scjp.xml.

The "Sun Certified Programmer for the Java Platform, Standard Edition 5.0" exam covers objectives like -

• Declarations, Initialization and Scoping
• Flow Control
• API Contents
• Concurrency
• OO Concepts
• Collections and Generics
• Fundamentals

The exam actually costs $150, but being a Sun employee I got it for free under SAI. :)

A minimum of 58.33% (35 questions out of 60) is required to clear the exam. And the time duration for the exam is 3 hours.

For preparation of the exam, here is the material that I followed; I think this should be enough to get a respectable score -

Sun Certified Java Programmer 5.0 - Kathy Sierra

This is a comprehensive book for the SCJP 5.0 exam, it covers all the objectives of the exam in a structured approach. Anybody attempting the exam should go through this book at least once.

Buy the book from Amazon.com at http://www.amazon.com/Certified-Programmer-Study-310-055-Certification/dp/0072253606