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CAREER SUMMARY

• Experienced in Networking and Operating Systems Development (2001 onwards)
• Experienced in Linux Kernel Internals (1999 – 2001)
• Product Development Experience in Windows Platforms and Exposure to SEI/CMM, ISO and Six Sigma Methodologies (1996 – 1999)

Details of Education

Academic Achievements

• Got through state level test in National Talent Search Examination (1990)
• Got First Rank in school in SSLC Examination , and 36th rank in Kerala state(1990)
• Got National Merit Scholarship for SSLC (1990)
• Got First Rank in college in PreDegree Examination (1992)
• Got University Merit Scholarship for PreDegree (1992)
• Got Second Rank in college in BTech Course (1996)
• Got All India Rank 42 in GATE 96 in Computer Science & Engg.(98.62 Percentile)
• Got All India Rank 32 in GATE 98 in Computer Science & Engg.(98.85 Percentile)
• Got First Rank in MTech in IITMadras (2001)
• Received CMC Medal for best academic record in MTech Computer Science (2001)

ACADEMIC PROJECTS

1. Compiler Generators (BTech Project)

Description: Creating two compiler writing tools called LEX and YACC (which are available in the UNIX environment) in DOS environment. LEX is a lexical analyzer generator and YACC is a parser generator. Using LEX and YACC, we can create compilers, which will give intermediate code. They can be also be used for writing applications for porting between high level languages. To demonstrate the capabilities of LEX and YACC, a Pascal to C converter was also written.

Platform: DOS
Tools Used: Turbo Pascal
Location: Govt. Engineering College, Trichur

2. Linux for Indian Languages (MTech Project)

Description: This project involves developing a local language interface for Linux operating system. The main Tasks include modifying the console device driver for incorporating the necessary support for displaying fonts for Indian languages, developing the fonts following the ISCII (Indian Standard Code for Information Interchange) Standard, developing shells for different languages and providing local language interface for some of the Applications (e.g. e-mail, web browsing etc.). The project is mentioned in Issue 103 of Linux Journal (November 2002).

Location: Indian Institute of Technology, Madras.
Project Website: http://www.tenet.res.in/Donlab/Indlinux/index.html

PROFESSIONAL EXPERIENCE

Software Industry

Other Work Details

• Served as System Administrator at Department Computer Facilities at Indian Institute of Technology, Madras From October 1999 to January 2001 as part of the Post Graduate Scholarship scheme, Government of India.
• Worked as Teaching Assistant during various courses at Usha Martin Academy of Communication Technology , IIT Madras during June 2000 - December 2000.

Professional Awards Received

• Performance award for the Crystal project team from Wipro GE Medical Systems (December 1997).
• Management award for Exemplary Performance from Wipro GE Medical Systems (January 1999).
• Pioneer, Technology Innovation Award for the year 2002, for the IOS - High Availability Project, from President, Cisco Systems (September 2002).
• Reliability, Availability and Serviceability (RAS) Award for IOS - Stateful Switchover Project from Cisco Systems (October 2002).
• Patent Submission Award for "An Algorithm for Optimizing Access Control Lists" , from Cisco Systems (October 2002).
• Patent Award for "Minimal Disruptive Upgrade of Computer Systems", from Cisco Systems (March 2003).
• Patent Submission Award for "A Mechanism to Automate Collection of Debug Information from Routers" from Cisco Systems (April 2003).

PROJECT EXPERIENCE

1. CRYSTAL Image Viewer

Description: Crystal was the first product development program initiated by Global Software Operations India of Wipro GE. It is a PC based medical image review station. The product is completely based on the DICOM protocol for medical imaging (for both networking as well as storage of data)

The application is having two threads. The main thread and the network thread running in background. The network thread listens for association requests from scanners or other medical review stations. If the images are send to the system, the images will be parsed and installed into the database of system.

The database is a native database system based on flat files and directory structures. The design is done in such a way that easy access of data is possible.

There is a local browser in the application, which provides a list of images in the database in the exam/series/image hierarchy according to DICOM standard. The user can select images for viewing, which will be displayed in the viewports. The user can view them in different formats, do different processing like zoom, pan, magnifying glass, filtering , window level & width , flip & rotate , ROI (region of interest) measurements, color manipulation etc. It is also possible to run the images in a continuous loop, and also to save the loop as an AVI file. Single image can be exported to different formats including BMP, and images can also be imported from these formats back into DICOM format.

Facility is there to query to a remote scanner or review station to get a remote browser, which will be displayed in a user interface thread. Images can also be pulled / pushed. A DICOM network toolkit DLL is used for the end transfer of images. The other features include capturing images from Ultrasound scanners using a video grabber card, Reporting functionalities , Error logging mechanisms etc. The product is now installed in different hospitals in India and abroad.

Platforms: Windows NT 3.51 / 4.0, Windows 95/98
Tools Used: Visual C++ 4.0, Visual C++ 5.0
Duration: January 1997 - April 1999
Team Strength: 5

Responsibilities: Team member from January 1997 to September 1997, Team Leader from September 1997 to April 1999. My responsibilities included Design, Implementation, Testing, User Manual Preparation & Packaging, and Installation at customer sites. I was also Quality Representative of the project.

2. Image Viewer Subsystem Design (Six Sigma Project)

Description: This was my Six Sigma Green Belt project. The project was to improve the speed of image display process and image filtering process in the Crystal medical image viewer. A measurement mechanism was used to find out the time taken if different steps of execution of project. The mean and variation of the measurements is found out. Using DFSS techniques, a new design was proposed and implemented. Measurements were taken again to verify the design.

Platform: Windows 95
Tools Used: Minitab , Microsoft Excel , Visual C++ 5.0 , Rational Rose.
Duration: November 1998 - March 1999

3. Oblique Cross Section Tool

Description: This project is to create a tool for reconstructing oblique cross sectional views of medical images. Medical images, coming out of scan sequences, are stored as series of images. The images are called slices. There is a user interface provided by which the doctor can select the series from the database. Then he can use an interface in the form of a cube to select the cross section plane, which can be vertical, horizontal, or oblique. After the selection, a cross sectional view will be constructed from the series of slices, taking care of the slice thickness and slice spacing. Interpolation algorithm is used in forming an enlarged image.

Platforms: Windows 95
Tools Used: Visual C++ 5.0
Duration: January 1998 - August 1998
Team Strength: 5
Responsibilities: I was involved in the design of the system, and then participated in
the implementation stage as a consultant.

4. DICOM Parser Toolkit

Description: This project is to develop a Dynamic link library toolkit for DICOM programmers. They can use the classes in the toolkit for parsing DICOM files. The DICOM file consists of a series of tags, with even the pixel data of the images stored as tags. The parser extracts the tag-tokens from the file. There are tag classes provided for additional tag level parsing. The programmer can use these classes or customs them by deriving his own classes from them in application.

Platforms: Windows 95 , Windows NT 4.0
Tools Used: Visual C++ 5.0
Duration: September 1998 - November 1998
Team Strength: 1
Responsibilities: I was the only member of the project and I handled all the activities of the project.

5. DICOM Network Server

Description: This project is to develop a DICOM network server. The server will run in background, But a user interface is provided to configure the server. The doctors can push images to the DICOM server, where, depending upon the doctor's name, the images will be stored in different folders. Later on, different doctors can query to the server and get the required images from different folders.

Platforms: Windows 95, Windows NT 4.0
Tools Used: Visual C++ 5.0
Duration: December 1998 - January 1999
Team Strength: 2
Responsibilities: Design , Implementation , Testing

6. Web Based DICOM Image Viewer

Description: This is a simple ActiveX control for displaying DICOM images. It used the DICOM parser DLL as Plug-in. The DICOM file is parsed and is displayed by the ActiveX control. This tool is used by service engineers for giving demonstration of sample images to customers.

Platform: Windows NT/95
Tool Used: Visual C++ 5.0
Duration: February 1999 - March 1998.
Team Strength: 1

7. High Availability on 7500 router

Description: This project is to provide a mechanism to synchronize two route processors on a Cisco 7500 router to maintain the state information of the active processor in sync with the standby processor so that on conditions of failure, the standby takes over immediately, resulting in reduced failure time and high availability in the affected network. This project received “Pioneer, Technology Innovation Award” from the president of the company. I was working in the “platform group” of the project.

Platform: Cisco IOS
Duration: June 2001 – March 2003
Team Strength: 10

TRAINING & SEMINARS ATTENDED

• Windows NT Training given by Wipro GE Medical Systems(1998)
• Training on DFSS Methodologies given by GE Medical Systems(1998)
• Professional Development Course given by GE Medical Systems , India (1998)
• Training on Communication Skills given by Wipro GE Medical Systems (1998) (Faculty : Accord Consultants , Bangalore)
• Workshop on CORBA given by System Logic , Bangalore (1998)
• Training on SEI-CMM Framework given by Global System Technologies , USA (1998)
• Training on OOAD & UML given by Wipro GE Medical Systems (1998)
• Six Sigma Characterize Training given by GE Medical Systems , India (1998)
• Seminar on CORBA by Dr. Thomas Mowbray (1999)
• Training on Internet Technologies given by Wipro GE Medical Systems (1999) (Faculty : Accord Consultants, Bangalore)
• COM/DCOM Training (2001) (Faculty: SystemLogic, Bangalore)
• Cisco Internetwork Operating System Architecture training given by Cisco Systems, India (2001)
• Introduction to Cisco Network Devices given by Cisco Systems, India (2001)

PUBLICATIONS

• "Indian Language Support for Linux Operating System" Authors: J Patricia, K Ratheesh, VS Shenoi, G Sreepriya, Dr TA Gonsalves, Dr Hema A Murthy. Presented at International Symposium: Information Technology, People Development and Culture, JK University , Allahabad. Feb 2001.
• "Distributed Garbage Collection - A Survey" Authors: Ratheesh K, Jagadeesh Arise, Chenna Kesava Rao, GT Nadiyan Selvam, Udayabhanu, Priyatham. April 2000.
• "Console Based Indian Language Support for the Linux Operating System" , Ratheesh K, MTech Thesis, Indian Institute of Technology Madras. Click Here to Download the thesis in PDF format.

PERSONAL INFORMATION