Bachelor and Master work

Project 1:

Project title: Wireless mesh nodes for ad-hoc communication infrastructures at construction sites

Guide: Prof. Torsten Braun and Dr. Thomas Staub (then a PhD student)

Location: Institute of computer science and applied mathematics, University of Bern, Switzerland

Duration: 16 May 2008 - 31 July 2008

My position: Research assistant (It was my summer internship after my 3rd year of Bachelor study at IIT Roorkee)

Work description:

The project aimed at deployment of wireless mesh nodes at a construction site. The construction site is well below the ground and usual means of

communications such as mobile, etc are unable to function there. The idea was to deploy mesh nodes efficiently inside the construction site where the workers can be in contact with the main office via Samsung's UMPC (Ultramobile PC) through the network created by the mesh nodes which are connected to the gateway which in turn is connected to the internet and hence the main office where the engineer/administrator is sitting. I started the project by preparing the UMPC first. Installed gentoo (Linux) on it. Then I calibrated the stylus. Then I made Graphical User Interfaces in Java which will be used by the worker at the construction site (GUIs are displayed in the summer internship.pdf in the download) Then the next step was to establish a connection between Wireless mesh nodes. Then I wrote codes for communication between the Wireless mesh node (Client) in C++ and the UMPC (server) in Java. Examples available at Sun Microsystem's website were very helpful while writing these codes. Finally I could establish connection between the UMPC and the mesh nodes. The step of deployment of these nodes was carried out later after my term was over. You can download the detailed presentation about the work done from the download section of the website.

Project 2:

Project title: Testing efficiency of Small hydro power plant situated at AHEC department of IIT Roorkee (DATA ACQUISITION related work)

Guide: Prof. Vinod Kumar, Head, Department of Electrical Engineering, Indian Institute of Technology, Roorkee

Location: IIT Roorkee, India

Duration: December 2007 - April 2008

My position: Student project (I took it voluntarily. It was not connected to any credits)

Work description:

In this project before testing the efficiency, we need to acquire the various parameters such as rate of water flow, pressure head, water level from the power

plant. We did the following step by step :-

• Used data acquisition modules (DAQ cards from National Instruments) to acquire the above data in the form of voltage and current.

• Developed a LabVIEW graphical code to display this data on the PC.

• Web publishing feature of LabVIEW was used so that the data can be monitored from remote places

• Whole set up was based on TCP/IP protocol so that web based remote monitoring of SHP can be carried out.

Project 3:

Project title: Implementation of Phasor Measurement Unit

Guide: Prof. RP. Maheshwari, Department of Electrical Engineering, Indian Institute of Technology, Roorkee (related to DATA ACQUISITION and Modelling)

Location: IIT Roorkee, India

Duration: August 2008-May 2009

My position: Bachelor thesis project

Work description: Phasor Measurement Unit is a device (mostly microprocessor based) which reports the magnitude and the phase angle of an analog and/or derived phasor with respect to the global time reference. It is one of the techniques used for Wide Area Protection (WAP). PMUs in power systems can provide accurate angle measurements.Phasor technology provides time synchronized sub-second data which is applicable for wide area monitoring, real time dynamics and stability monitoring. The crux of the work done by me is mentioned below. You can download the detailed presentation about the work done from the download section of the website.

• Simulated a power system network on one PC.

• Wrote a graphical code in LabVIEW to acquire real time data to the network (from the electrical sockets)

• Data is sent to remote PC using the web publishing feature of LabVIEW and monitored for faults.

• Fault monitoring code highlights the region (by an LED) where the fault has occured.

The LabVIEW code written is shown below.

Project 4:

Project title: Rate Allocation in 3D-TV

Guide: Prof. Pascal Frossard, Department of Electrical and Electronics Engineering, EPFL, Switzerland.

Location: EPFL, Switzerland

Duration: March 2010 - June 2010

My position: course project in Image Communication

Work description:

In brief I performed the following experimental operations :-

• Find the effect of depth map compression on rendered views

• Find the effect of view compression on rendered views.

• Find the optimal rate allocation between both disparity maps and both views.

• Find the effect of low bit allocation to Depth when the view are compressed at high bit rate.

You can download the detailed presentation about the work done from the download section of the website.

Project 5:

Project title: Finding the mark and space frequencies and their time stamping

Guide: Noca Muriel, Space center, EPFL

Location: Space center, EPFL, Switzerland

Duration: July 15, 2010 - September 15, 2010

My position: Signal processing specialist (Summer Intern)

Work description:

• In brief I worked on a previously built drift detection software in order to calculate the frequency drifts present in the signals due to Doppler's effect.

• Built algorithms in order to detect the position of frequency changes and time stamp the exact location of mark and space regions present in the signal which is acquired in real time from Swiss Cube satellite.

You can download the detailed presentation about the work done from the download section of the website.

Project 6:

Project Title: Trans-cranial imaging of brain using Utrasound

Guide: Prof. Jean Philippe Thiran, Head, LTS-5, Swiss Federal Institute of Technology (EPFL), Lausanne, Switzerland

Location: EPFL, Switzerland

Duration: October 1, 2009 - June 30, 2011

My position: 50% research assistant, Also includes my master thesis

Work description:

• The project aims at development of completely non invasive technique for trans-cranial imaging of brain by high-intensity focused ultrasound beams.

• My work involved performing simulations on Matlab compatible COMSOL Multiphysics software.

• I also did practical experiments with Ultrasonic instruments with Prof. Jean Pascal Reymondin at HEIG VD, Yverdon les bains, Switzerland

You can download the detailed presentation about the work done from the download section of the website. The total work has been summarized in 3 documentations each having their own significance.