Arihant Sethia

Projects

Distributed Alignment of Sequences using Hash (DASH)

[SourceCode]

Programming Language : C++

• Implemented a distributed system to align DNA reads obtained from experiments in human genome.
• Implemented an indexer to create an offline index of genome to speed up mapping. Human genome has ~3 billion base pairs.
• The system is capable of mapping DNA sequences upto a give error threshold.
• Distributed implementation allows the use of ultra cheap machines to do powerful computations.

De-Identification of Medical Records

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Programming Language : Java

• Designed and develop a flexible software suite to help in clinical data analysis.
• The suite currently deploys techniques to de-identify medical records and extract medical concepts from medical corpus.

Sp.RDBMS

[SourceCode]

Programming Language : Java

• Developed a simple relational database management system from scratch in Java.
• Using this RDBMS users could create multiple databases and tables.
• Implemented various queries like SELECT, INSERT, CREATE, UPDATE, DELETE, etc.
• All queries could contain FROM and WHERE clauses. We also implemented code to handle nested ANDs and ORs in WHERE clause.
• We also implemented advance features likes indices, primary key, unique check constraints, etc. using a B+ Tree
• Join queries corrosponding to Equi-Join, Natural-Join and Conditional-Join were also implemented.
• Apart from this we ensured, that we reduce disk I/Os by using a buffer of pages and writing them to disk only when they need to be replaced.

Search Engine

[SourceCode]

Programming Language : Python

• Developed a search engine using Python.
• Indexing was done on 1.6 Million web pages.
• Supported various methods for querying over the data set using '+','-' for AND & NOT operations.
• Currently the scoring has been done using TF, TF-IDF, BM-25 method. Further developments in scoring methods along the lines of link analysis will be done.

Cp.FTP

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Programming Language : C++

• Implemented a FTP client-server application using sockets library in C++

LL(1) Parser

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Programming Language : C++

• Developed a LL(1) parser for a subset of C language using C++
• We also implemented another version using tools like YACC and Flex.

HaskenBush

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Programming Language : Haskell

• Developed the game of Red-Blue-Green Hackenbush using Haskell
• Provided a simple clickable user interface for player(s) to play.
• Supported Human vs Human & Human vs Computer matches on random trees generated of various difficulties.
• This was developed using various open source libraries like Gtk, Glade.

Coding Portal for IIT-Guwahati

[SourceCode]

Programming Language : Python

• Developed an online portal where coding contests can be held by Coding Club of IIT Guwahati.
• Users could code and submit solution on the portal in multiple languages.
• Users could see their ranking on the leaderboard. They could also follow their friends and know their recent submissions.
• A user friendly admin portal allowed addition/creation of contests.
• This was built on a python backend using flask micro framework.

Assembler Linker Loader

[SourceCode]

Programming Language : Python

• Built an software for converting custom assembly language code defined on an instruction set into 8085 assembly code.
• Software would link different files and their variables and load it in appropriate location in the memory as defined by the user.
• Software allowed user to declare and use macros across various files that are to be linked.
• The final generated code would follow the standards of 8085 assembly code and could be run on a simulator like GnuSim8085 .

Gymkhana Automation Portal

[SourceCode]

Programming Language : JSP

• Developed an online portal to automate the approval process for event and venue booking in IIT-Guwahati.
• It enabled secretaries/teachers to raise application to conduct an event completely online including venue reservation etc.
• The raised events would then be forwarded to respective authorities who could approve/cancel that event. This forwarding of application followed a pre-defined protocol setup by IIT Guwahati administrators.
• Application raiser/approver could keep a track of progress of the application submitted.
• An approved event would then be processed for venue booking by forwarding the application following the preset protocols.
• This project was build using JSP and MySQL.
• This portal was the winning entry of website development competition held in Kriti - Inter-Hostel Technical Competition 2013

SilentZio

[SourceCode]

Programming Language : Java

• Developed an android application to manage(by silencing) calls of the user according to his Google calendar events.
• User could add/remove the events filters for which he wants to silence the calls.
• User could also enable the SMS feature which would send a SMS to the caller based on the calendar events.
• I contributed in this project by designing and developing the UI, Core Logic, and Managing User Data.
• This application can be installed from Google Play Store (Not working on Android v4.1+ ).

Card Matching Game

[SourceCode]

Programming Language : Visual Basic

• Developed a Card Matching game for kids to help them sharpen their memory skills with fun.
• As the user advances, level of difficulty increases due to change in number and type of cards
• User could keep a track of his high score and attempt to beat it
• This was developed on Visual Studio 2012 Development Environment.

Digital Bread Board Simulator

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Programming Languages : Java, JS, PHP, HTML, CSS

• Developed GUI for a Virtual Breadboard (circuit board) Simulator using Java.
• It included features such as addition/removal of various electronic components using drag-and-drop interface, automatic snapping-in of components into nearest breadboard holes, warning mechanism for erroneous connections.
• The software generated a text file containing connection information for all components.
• The application was downloadable from a server with options for signup/login implemented using PHP and MySQL.

Spell Checker

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Programming Language : C++

• Developed a spell checker which could check and report a particular file for spelling errors and also suggests possible corrections.
• An English dictionary was used for error checking which was stored in a left-child-right-sibling tree data structure which gave quick and efficient results
• Also, relevant correction suggestions were provided back to the user which were found using Levenshtein Distance.